replace NULL->nullptr in src/remoting.

remoting/protocol/v2_authenticator.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "remoting/protocol/v2_authenticator.h"
 
 #include "base/base64.h"
 #include "base/logging.h"
 #include "remoting/base/constants.h"
 #include "remoting/base/rsa_key_pair.h"
@@ skipping 13 matching lines @@
 
 const buzz::StaticQName kEkeTag = { kChromotingXmlNamespace,
                                     "eke-message" };
 const buzz::StaticQName kCertificateTag = { kChromotingXmlNamespace,
                                             "certificate" };
 
 }  // namespace
 
 // static
 bool V2Authenticator::IsEkeMessage(const buzz::XmlElement* message) {
-  return message->FirstNamed(kEkeTag) != NULL;
+  return message->FirstNamed(kEkeTag) != nullptr;
 }
 
 // static
 scoped_ptr<Authenticator> V2Authenticator::CreateForClient(
     const std::string& shared_secret,
     Authenticator::State initial_state) {
   return make_scoped_ptr(new V2Authenticator(
       P224EncryptedKeyExchange::kPeerTypeClient, shared_secret, initial_state));
 }
 
@@ skipping 148 matching lines @@
   if (is_host_side()) {
     return SslHmacChannelAuthenticator::CreateForHost(
         local_cert_, local_key_pair_, auth_key_);
   } else {
     return SslHmacChannelAuthenticator::CreateForClient(
         remote_cert_, auth_key_);
   }
 }
 
 bool V2Authenticator::is_host_side() const {
-  return local_key_pair_.get() != NULL;
+  return local_key_pair_.get() != nullptr;
 }
 
 }  // namespace protocol
 }  // namespace remoting